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тАО06-04-2009 03:15 AM
тАО06-04-2009 03:15 AM
I happened to trace a Oracleprocess which is suppose to be terminating at a particular time( i was expecting them to be finish before 10.oo Hrs; see the extract o/p below). But i could see the same PID in the extract o/p more time running than expected. I am not sure if the same process was still running or a new one with same PID.
06/03/2009|07:45| 23367|oraclep500 |oracle | 0.00| 0.7| 4.5| 1.25| 0.25| 17704|
06/03/2009|07:46| 23367|oraclep500 |oracle | 0.00| 0.0| 0.7| 0.82| 0.44| 4988|
06/03/2009|09:16| 23367|oraclep500 |oracle | 0.00| 0.0| 0.0| 0.00| 0.00| 9592|
06/03/2009|09:33| 23367|oraclep500 |oracle | 0.00| 0.0| 0.0| 0.00| 0.00| 32|
06/03/2009|11:12| 23367|oraclep500 |oracle | 0.00| 0.0| 0.0| 0.00| 0.00| 3068|
Solved! Go to Solution.
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тАО06-04-2009 03:21 AM
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тАО06-04-2009 03:40 AM
тАО06-04-2009 03:40 AM
Re: How OS picks the PID
There is a table out there and PID's are picked sequentially.
ITs very simple.
You might find a leak detector script I wrote useful in this hunt
http://www.hpux.ws/?p=8
It identifies processes by memory use and is very flexible.
SEP
Owner of ISN Corporation
http://isnamerica.com
http://hpuxconsulting.com
Sponsor: http://hpux.ws
Twitter: http://twitter.com/hpuxlinux
Founder http://newdatacloud.com
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тАО06-04-2009 07:22 PM
тАО06-04-2009 07:22 PM
Re: How OS picks the PID
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тАО06-04-2009 08:11 PM
тАО06-04-2009 08:11 PM
Re: How OS picks the PID
It seems in order to do this, PIDs can't be assigned sequentially, they would use a FIFO algorithm, which is initially sequential.
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тАО06-08-2009 04:15 PM
тАО06-08-2009 04:15 PM
Re: How OS picks the PID
So on one ps(1) output, it is possible to see the same PID used for two processes.
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тАО06-09-2009 03:45 AM
тАО06-09-2009 03:45 AM
Re: How OS picks the PID
Volkmar